Migrate to Manifest V3

[jchicano]

🔄 Migrate to Manifest V3 for Chrome 141+ Compatibility

Overview

This PR migrates the Decreased Productivity extension from Manifest V2 to Manifest V3 to restore compatibility with Chrome 141+ and make it publishable on the Chrome Web Store again. The extension was previously delisted due to Manifest V2 deprecation.

🎯 Key Changes

Manifest V3 Migration

• Updated manifest.json to version 3 with all required API changes
• Converted background script to service worker architecture
• Replaced deprecated APIs:
  • chrome.pageAction → chrome.action
  • chrome.tabs.executeScript → chrome.scripting.executeScript
  • chrome.extension → chrome.runtime
• Added proper permissions: scripting, storage, contextMenus
• Moved host permissions to host_permissions section

Service Worker Implementation

• Implemented localStorage shim using chrome.storage.local for service worker compatibility
• Added proper message passing between service worker and content scripts
• Maintained all original functionality while adapting to MV3 constraints

Bug Fixes & Improvements

• Fixed whitelist/blacklist domain detection synchronization
• Resolved hotkey functionality issues
• Improved options page storage synchronization
• Enhanced error handling and debugging capabilities
• Fixed demo window preview functionality

Version & Documentation

• Bumped version to 0.47.0.1 (minor version for compatibility update)
• Updated README with fork information and installation instructions
• Added comprehensive changelog

✅ Functionality Preserved

All original features remain intact:

• Domain-based cloaking (whitelist/blacklist)
• Customizable appearance settings
• Hotkey support (Ctrl+F12, Alt+P)
• Context menu integration
• Icon and title customization
• Import/Export settings
• All cloak modes and presets

🧪 Testing

The extension has been thoroughly tested with:

• Chrome 141+ (current version)
• All major cloaking features
• Hotkey functionality
• Domain list management
• Settings persistence
• Cross-tab synchronization

📦 Installation

Users can install via:

1. Download the extension files
2. Enable Developer Mode in Chrome
3. Load unpacked extension
4. All functionality works immediately

🔧 Technical Details

• Minimum Chrome Version: 88 (as required by MV3)
• Manifest Version: 3
• Service Worker: Yes (replaces background page)
• Storage: chrome.storage.local with localStorage fallback
• Content Security Policy: Updated for MV3 compliance

🎉 Result

The extension is now fully compatible with modern Chrome versions and ready for Chrome Web Store publication, maintaining 100% of its original functionality while meeting Google's latest extension requirements.

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Closes: Compatibility issues with Chrome 141+
Fixes: Manifest V2 deprecation warnings
Enables: Chrome Web Store publication

This migration was completed with assistance from Cursor AI to ensure code quality and compatibility.